<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>v-show</title>
</head>
<body>
    <div id="app">
        <input type="button" value="change" @click="changeD">
        <h2 v-show="isShow">hello hahahah</h2>
    </div>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el: "#app",
            
            data: {
                isShow: true,
            },

            methods:{
                changeD: function(){
                    this.isShow = !this.isShow;
                }
            },
        })
    </script>
</body>
</html>